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WorksheetsUnit A and D Exam
Total questions: 50
Worksheet time: 50mins
A mixture can involve two or more substances of the same phase or different phases.
True
False
Different phases involve liquid solid & gas. Which phase is this?
Solid
Liquid
Gas
A mix of liquid and solid
A mix of a gas and a liquid
When a sample of matter has the same composition throughout its called...
Homoegenous
Heterogenous
A Solution
A Mixture
What part of a solution does the dissolving?
Solvent
Solute
Soluble
Solventable
Constant
Concentrated solutions are when...
There is a heavy amount of solute in a solution
There is the maximum amount of solute in the solvent
There is a small amount of solute in a solvent
There is a concentrated level of solute equal to the solvent
Colloids, emulsions & suspensions fall under...
Heterogenous Mixture
Homogenous Mixture
Solutions
Phases
(Bigger particles end up on top) Sieving separates...
Solids from Solids
Solids from Liquids
Liquids from Gases
Solids from Gases
Liquids from Liquids
True or False?
An insoluble substance is a substance that dissolves into another.
True
False
The suspension mixture of sand + water is best separated by ______.
Filtration
Sieving
Evaporation
Simple Distillation
Settling (or sedimentation)
If a solution of salt and water is being separated by evaporation. Would you end up with just the salt or just the water?
Just the salt
Just the water
Both
Neither
Solids have...
Definite shape and definite volume
Indefinite shape and definite volume
Indefinite shape and indefinite volume
Definite shape and Indefinite volume
Liquids have
Indefinite shape and indefinite volume
Indefinite shape and definite volume
definite shape and indefinite volume
definite shape and definite volume
Solid to liquid
Fusion
melting
Condensation
solidification
An example of a pure substance is
milk
oil and water
aluminum foil
vegetable soup
Another name for homogeneous mixture is
an element
a compound
a solution
A higher temperature makes the solute dissolve faster
True
False
Change of State
Gas to Liquid
Sublimation
Condensation
Solidification
Vaporization
_______ is the amount of space an object takes up.
Shape
Weight
Volume
Temperature
What does this symbol represent?
flammable material
biohazardous material
dangerously reactive material
compressed gas
What does this symbol represent?
biohazardous material
flammable material
corrosive material
irritant material
When an object floats suspended (equal gravitational and buoyant forces), what is this called?
neutral buoyancy
equal buoyancy
standard buoyancy
common buoyancy
Using fluids under pressure to move loads is called . . .
fluid system
flotation system
hydrometer system
hydraulic system
The pulley system illustrated here was used to lift a heavy load. If 340N of force is used, how much force is the pulley system able to overcome? (Show your work)
In most simple machines, you don’t get something for nothing. When you gain a force advantage, you usually lose ...
effort
speed
distance
resistance
A simple machine that converts rotational motion to linear motion is called ...
Class 1 lever
Inclined plane
Wedge
Screw
If it takes 45 N of force to lift a 180 N carton using a pulley system, what would the pulley system look like …
A
B
C
D
To calculate mechanical advantage, or force ratio, you divide the output force by the input force. A machine that is able to move an object that weighs 360 Newtons with 6 Newtons of force has a mechanical advantage of …
60
100
360
366
Efficiency is a measure of how well a machine does work. Dividing the mechanical advantage by the speed ratio and multiplying the result by 100 will determine the efficiency of the machine. A pulley system that has a speed ratio of 3 and a mechanical advantage of 2 has an efficiency of …
33%
67%
60%
30%
Work is calculated using the formula – W = F x d. If you lift a box onto your desk that is 0.4 meters off the floor, using 50 Newtons of force, how much work are you doing?
20 Joules
125 Joules
50.4 Joules
49.6 Joules
A common application of the hydraulic system is the hydraulic jack, like the one shown here …
syringe piston
hoist piston
output piston
input piston
The hydraulic jack, like the one shown here, identifies the input force piston and the output force piston … F input = 50N F output = 1500N The mechanical advantage of this hydraulic jack is …
30
300
1000
2000
The church key was the first practical design for opening a can. It was a simple machine that multiplied the force needed to open the can. The simple machine it was designed after was the ...
block and tackle
1st class lever
2nd class lever
3rd class lever
The design of mountain bikes to handle the rough terrain they would be used in, is considered to be evaluating a function because of this influence ...
mass appeal
mass demand
environment
ergonomics
In a lever system, if the effort arm is 4 meters and the load arm is 1 meter, what is the mechanical advantage?
1
2
4
3
What is the primary function of a gear train in a mechanical system?
All of the above
To transmit torque
To change direction of motion
To increase speed
Any device that helps us do work is called.
A producer
A machine
A blessing
A contraption
The 6 simple machines are...
Lever, nail, screw, pulley, wedge, wheel & axle
Hammer, inclined plane, screw, pulley, nail, wheel & axle
Lever, inclined plane, screw, pulley, wedge, wheel & axle
Inclined plane, diamond, pulley, wedge, metal, wheel & axle
The formula for finding the mechanical advantage is...
Input / output
output / input
speed / height
angle / speed
____________________ is a force that opposes motion.
Angle
Twisting
Friction
Speed
potential energy
stored energy
force that opposes motion
used to overcome the frictional force of the machine
a measure of the amount of force applied to a given area
kinetic energy
stored energy
the rate of motion that an object changes position
the ratio of the output to the input of any system
energy of motion
pressure
energy is transferred from one place to another, and no energy is changed or converted
a measure of the amount of force applied to a given area
consists of a wire, rope, or cable moving on a grooved wheel. One or more combinations of wheels and ropes can be fixed in place or moveable, help you lift larger loads
a group of parts that work together to perform a function
You are trying to move a heavy rock and the pulley system is 87% efficient, the inline plane is 56% efficient and the lever is 84%. Which machine should you choose?
Incline plane
Pulley
Lever
